Anything you can Do by Randall Garrett — Read

Captain Davidson Greer sat in a chair before an array of TV screens, his gray-green eyes watchful. In the center of one of the screens, the Nipe's image sat immobile, surrounded by the paraphernalia in his hidden nest. Other screens showed various sections of the long tunnel that led south from the opening in the northern end of the island. At the captain's fingertips was a bank of controls that would allow him to switch from one pickup to another if necessary, so that he could see anything anywhere in the tunnels. He hoped that wouldn't be necessary. He did not want any of the action to take place anywhere but in the places where it was expected -- but he was prepared for alterations in the plan. In other rooms, nearly a hundred other men were linked into the special controls that allowed them to operate the little rat spies that scuttled through the underground darkness, and the captain's system would allow him to see through the eyes of any one of those rats at an instant's notice.

The screen which he was watching at the moment, however, was not connected with an underground pickup. It was linked with a pickup in the bottom of a basketball-sized sphere driven by a small inertial engine that held the sphere hovering in the air above the game sanctuary on the northern tip of Manhattan Island. In the screen, he had an aerial view of the grassy, rocky mounds where the earth hid the shattered and partially melted ruins of long-collapsed buildings. In the center of the screen was a bird's-eye view of a man holding a rifle. He was walking slowly, picking his way carefully along the bottom of the shallow gully that had once been upper Broadway.